Incorporating Negation into Visual Logics : A Case Study Using Euler Diagrams

@inproceedings{Stapleton2007IncorporatingNI,
  title={Incorporating Negation into Visual Logics : A Case Study Using Euler Diagrams},
  author={Gem Stapleton and Judith Masthoff},
  year={2007}
}
Many diagrammatic logics based on Euler diagrams have been defined with the aim of making precise reasoning easier for people. In such logics, it is unusual to find the negation operator (¬) included. This is likely to impact the usability of the logics when users try to make statements that are naturally phrased using the ¬ operator. Furthermore, if one wishes to use semantic tableaux methods for the purposes of establishing entailment then including ¬ is essential. Thus, there are good… CONTINUE READING

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